Safety device for mine-cars.



B. F. FERN SAFETY DEVICE FOR MINE CARS.

APPLICATIO N HLED APR.8, I915- 1,165,659.

Patented Dec. 28, 1915.

COLUMBIA PLANUGRAPH c0., \\ASHXNGTON. n. c

UNITED @TATE% PATEN FFIfiE.

BENJAMIN r. FERN, or SCRA'NTON, PENNSYLVANIA, ASSIGNOR or ONE-HALF r0FLORENCE s. FERN, or SORANTON, PENNSYLVANIA.

SAFETY DEVICE FOR MINE-CARS.

Application filed April 8, 1915.

To all whom it may concern:

Be it known that I, BENJAMIN F. FERN, a citizen of the United States ofAmerica, and resident of Scranton, in the county of Lack awanna andState of Pennsylvania, have invented certain new and useful Improvementsin Safety Devices for Mine-Cars, of which the following is aspecification.

This invention relates to mine cars and particularly to safety devicestherefor.

An object of this invention is to provide novel means for arresting thedescent of a mine car upon accidental impairment of the car supportingmechanism.

Another object of the invention is to provide novel means wherebygripping shoes are operated to cause the said shoes to engage the guiderail for a car and at the same time advancing the said shoes toward therail, augmenting the frictional or clamping engagement of the shoes withthe said guide rail.

The present invention is designed to be employed in connection with carsuspending means and shoe operating mechanism associated therewith ofany general type, an example of which is shown in patent issued May 1,1906, numbered 819,052.

A further object of this invention is to provide means for housing theshoes or their pivots and operating mechanism against access of waterwhich, if admitted would freeze and impair the action of the device.

WVith the foregoing and other objects in view, the invention consists inthe details of construction and in the arrangement and combination ofparts to be hereinafter more fully set forth and claimed.

In describing the invention in detail, ref erence will be had to theaccompanying drawings forming part of this specification wherein likecharacters denote corresponding parts in the several views, and inwhich- Figure 1 illustrates a view in elevation of a fragment of a carwith the safety appliance associated therewith; Fig. 2 illustrates aperspective view of a housing plate; Fig. 3 illustrates a perspectiveView of housings adapted to be connected to the housing plate; Fig. 4illustrates a sectional view on the line 4-4 of Fig. 1; and Fig. 5illustrates a view on a line corresponding with the line 5-5 of Fig. 1;Fig. 6 illustrates an Specification of Letters Patent.

Patented Dec. 28, 1915.

Serial No. 19,979.

enlarged detail View showing a section of the housing of the shoe in anelevated position.

In these drawings 6 denotes an elevator which may be of the general typeof that shown in the patent above mentioned, the same having rods 7pivoted to apertured ears 8, said rods being operated in known mannerupon removal of the car support or car operating means, as when thecables are severed. The shoes 9 have teeth 10 which are adapted toengage the guide rail and the said shoes have hubs 11 with trunnions l2projecting into slots 13 and 14trespectively in the housing plate 15 andthe housing 16. There is a joint 17 intermediate the length of each rod7 so that there is oscillatory movement afforded the lower end of eachrod 7 sufficient to permit the said rod to swing with relation to thehousings and to follow the movement of the shoe as it is moved withrelation to the guide rail.

In carrying the invention into practice, the housing plate 15 is securedto a frame of an elevator car by the fastenings 18 and the said housingplate has inverted T-shaped recesses 19 adapted to receive the T-bolts20 by which the housing plate is secured to the housing, it being seenfrom an inspection of Fig. 3 of the drawing that the edges of thehousings have recesses 21 which receive the shanks of the T-bolts.

The housing plate has withstanding lugs with teeth 22 formed thereon,said teeth constituting a rack which engages the teeth 23 on the hub 10of a shoe and the interengagement of the rack and the teeth of the shoeis such as to cause the shoes to move longitudinally of the housingplate while swinging on the pivots or trunnions. From an inspection ofFig. 1, it will be apparent that should the rod 7 be moved upwardly, theshoe would be oscillated on its pivot and at the same time theinterengaging teeth just described would cause the shoe to advancetoward the guide rail, thus forcing the teeth of the shoe into such firmengagement with the guide rail as to prevent slipping and this actionwould be increased proportional to the swinging movement of the saidshoe on its pivot.

While the last paragraph refers to the shoe and the parts associatedtherewith in the singular, it is to be understood that the saiddescription applies to the shoes oneachf engagesthe rack, the end of therack being curved so that the horn extends there above; One function ofthe horn is tdprevent the shoe from becoming operative until the supportis removed, and its operating above the rack prevents the strain frombeing Wholly on the cog teeth and trunnions and it also prevents theshoe from turning completely over should the lug 26 be broken off. It isunderstood, of course, that the lug 26 is pro vided so that it will abutthe house plate and limit the movement of the shoe and the hornsupplements the lug in this respect.

I claim:

1. In an elevator a car, a housing plate carried by the car, housingssecured to the housing plate, racks inclosed by said housing plate, thesaid housing plate and housings having longitudinally disposed slots,shoes having trunnionsslidablein the slots and oscillatingly mountedtherein, teeth carried by the shoes and adapted to engage the rackswhereby the oscillatory movement of the shoes causes the teeth oftheshoes to travel with relation to the racks for advancing the shoestoward the guide rail of a car, and means for oscillating the shoes Whenthe support is removed.

2. In a safety device for elevators, a housing plate secured to a car,housings, racks inclosed by the housings,'said housings and housingplate having slots, shoes slidably trunnioned in the slotsof thehousings, hubs, and teeth on the said hubs adapted to engage the racksofthe housings for advancing in the slots; 7

' 3. In a safety device for elevator cars,

the shoes While their trunnionsare rotat- J housings, racks therein,shoes having vteeth "and studs mounted to partially rotate and slide inthe housings, means on the shoes enthe racks for advancing the shoesduring their partial rotation, and means for holdingthe shoes normallyout of 'eng'age ment With the guide rail When the elevator is in normalcondition.

4. In a safetydevice for elevator cars, housings, racks therein, shoeshaving teeth and studs mounted to partially rotate and slide ,in thehousings, means on the shoes engaging the racks for advancing the shoesduring their partial rotation, and a hornon each shoe adapted to abut ahousing for limiting the movement of the shoe.

5. In a safety. device for elevator cars, housings, racks therein, shoeshaving teeth and studs mounted to partially rotate and slide in thehousings, means on the'shoes engaging the racks for advancing the shoesduring their partial rotation; and a horn on each shoe and adapted toengage an abutment for limiting the movement of the shoe.

6. In a safety device for elevator cars, housings,-racks therein, shoeshaving teeth and studs mounted to partially rotate and slide in thehousings,means on the shoes engaging the racks for advancing the shoesduring their partial rotation, and each of said racks having a curvedsurface, a curved horn on each shoe adapted to engage the curved surfaceof a rack.

In testimony whereof, I aflix my signature in the presence of twoWitnesses. .7

BENJAMIN F. FERN.

Witnesses CHAs. KIMMICK, Six,

WM. I-I. FERN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. C.

